Parts of the Cell Membrane
Outside
of cell
Proteins
Carbohydrate
chains
Cell
membrane
Inside
of cell
(cytoplasm)
Go to
Section:
Protein
channel
Double Fat Layer
Homeostasis
• Maintenance of a stable internal condition
• Balance
Vocab
• Vesicle:
– Membrane-covered
compartments that
forms when part of the
cell membrane
surrounds an object
and pinches off
Diffusion
Definition: Movement of small
particles from an area of high
concentration to an area of low
concentration, like oxygen
Diffusion
Definition: Movement of small
particles from an area of high
concentration to an area of low
concentration, like oxygen
Diffusion
High
Low
Definition: Movement of small
particles from an area of high
concentration to an area of low
concentration, like oxygen
Diffusion
High
Low
Definition: Movement of small
particles from an area of high
concentration to an area of low
concentration, like oxygen
Diffusion
Requires NO ATP
(energy), moves
only small particles
High
Low
Definition: Movement of small
particles from an area of high
concentration to an area of low
concentration, like oxygen
Osmosis:
the
diffusion
of water
Diffusion
Requires NO ATP
(energy), moves
only small particles
High
Low
Passive Transport
Definition: the movement of
medium particles from an area
of high concentration to an area
of low concentration through a
protein channel
Passive Transport
Definition: the movement of
small & large particles from an
area of high concentration to an
area of low concentration
through a protein channel
Passive Transport
Requires NO ATP
(ENERGY)
Just like
diffusion
but through
a protein
Definition: the movement of
medium particles from an area
of high concentration to an area
of low concentration through a
protein channel
Passive Transport
Requires NO ATP
(ENERGY)
Definition: the movement of
med. particles from an area of
high concentration to an area of
low concentration
Just like
diffusion
but through
a protein
High
Passive Transport
Requires NO ATP
(ENERGY)
Low
Definition: the movement of
med. particles from an area of
high concentration to an area of
low concentration
Just like
diffusion
but through
a protein
High
Passive Transport
Requires NO ATP
(ENERGY)
Low
Active Transport
Definition: the movement of
medium particles from an area
of low concentration to an area
of high concentration through a
protein channel
Active Transport
Definition: the movement of
med. particles from an area of
low concentration to an area of
high concentration through
protein channel
Active Transport
Requires ATP
(ENERGY)
Similar to
Passive
Transport
but requires
energy
Definition: the movement of
med. particles from an area of
low concentration to an area of
high concentration through a
protein channel
Active Transport
Requires ATP
(ENERGY)
Definition: the movement of
med. particles from an area of
low concentration to an area of
high concentration
Similar to
Passive
Transport
but requires
energy
Low
Active Transport
Requires ATP
(ENERGY)
High
Definition: the movement of
sm. & lg. particles from an area
of low concentration to an area
of high concentration
Similar to
Passive
Transport
but requires
energy
Low
Active Transport
Energy
Requires ATP
(ENERGY)
High
ENDOCYTOSIS
ENDOCYTOSIS
Definition: the cell taking in particles by surrounding
the particle and enclosing it in a vesicle
ENDOCYTOSIS
Definition: the cell taking in particles by surrounding
the particle and enclosing it in a vesicle
Step 1: the cell comes
into contact with a particle
ENDOCYTOSIS
Definition: the cell taking in particles by surrounding
the particle and enclosing it in a vesicle
Step 1: the cell comes
into contact with a particle
ENDOCYTOSIS
Definition: the cell taking in particles by surrounding
the particle and enclosing it in a vesicle
Step 1: the cell comes
into contact with a particle
Step 2: the cell
membrane begins to wrap
around the particle
ENDOCYTOSIS
Definition: the cell taking in particles by surrounding
the particle and enclosing it in a vesicle
Step 1: the cell comes
into contact with a particle
Step 2: the cell
membrane begins to wrap
around the particle
ENDOCYTOSIS
Definition: the cell taking in particles by surrounding
the particle and enclosing it in a vesicle
Step 1: the cell comes
into contact with a particle
Step 2: the cell
membrane begins to wrap
around the particle
Step 3: once the particle
is completely surrounded,
a vesicle pinches off
ENDOCYTOSIS
Definition: the cell taking in particles by surrounding
the particle and enclosing it in a vesicle
Step 1: the cell comes
into contact with a particle
Step 2: the cell
membrane begins to wrap
around the particle
Step 3: once the particle
is completely surrounded,
a vesicle pinches off
Endocytosis
EXOCYTOSIS
EXOCYTOSIS
Definition: Vesicles formed by the Golgi carry particles
to the cell membrane to be removed
EXOCYTOSIS
Definition: Vesicles formed by the Golgi or ER carry
particles to the cell membrane to be removed
Step 1: large particles that
must leave the cell are
packaged in vesicles
EXOCYTOSIS
Definition: Vesicles formed by the Golgi or ER carry
particles to the cell membrane to be removed
Step 1: large particles that
must leave the cell are
packaged in vesicles
EXOCYTOSIS
Definition: Vesicles formed by the Golgi or ER carry
particles to the cell membrane to be removed
Step 1: large particles that
must leave the cell are
packaged in vesicles
Step 2: the vesicle travels
to the cell membrane and
fuses with it
EXOCYTOSIS
Definition: Vesicles formed by the Golgi or ER carry
particles to the cell membrane to be removed
Step 1: large particles that
must leave the cell are
packaged in vesicles
Step 2: the vesicle travels
to the cell membrane and
fuses with it
EXOCYTOSIS
Definition: Vesicles formed by the Golgi or ER carry
particles to the cell membrane to be removed
Step 1: large particles that
must leave the cell are
packaged in vesicles
Step 2: the vesicle travels
to the cell membrane and
fuses with it
Step 3: the cell release
the particles into its
environment
EXOCYTOSIS
Definition: Vesicles formed by the Golgi or ER carry
particles to the cell membrane to be removed
Step 1: large particles that
must leave the cell are
packaged in vesicles
Step 2: the vesicle travels
to the cell membrane and
fuses with it
Step 3: the cell release
the particles into its
environment
Review Transportation Through
a Membrane
•
•
•
•
•
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Diffusion
Osmosis
Facilitated Diffusion
Active Transport
Endocytosis
Exocytosis